* signals.h: Don't undefine signals anymore.
* main.c: Use job_control from serial.h.
* fork-child.c (fork_inferior): Use gdb_setpgid.
* serial.h, ser-unix.c, ser-go32.c: Provide gdb_setpgid.
* utils.c (quit): Use current_target->to_terminal_ours to figure
out whether we care about lack of job control, rather than __GO32__.
* utils.c: Include serial.h not terminal.h
(quit): Use job_control not TIOCGPGRP.
* terminal.h: Don't undefine TIOCGPGRP.
* serial.h, ser-unix.c, ser-go32.c, ser-tcp.c: Add SERIAL_FLUSH_OUTPUT.
* utils.c (quit): Use it.
* serial.h: Add SERIAL_UN_FDOPEN.
* utils.c (quit): Use it.
* ser-unix.c: Add process group to ttystate.
[HAVE_SGTTY]: Add tchars, ltchars, and lmode to ttystate.
* inflow.c: Include serial.h not terminal.h.
Use serial.h stuff to replace most of the maze of #ifdef's.
* inflow.c, main.c, inferior.h: make gdb_has_a_terminal a function.
* serial.h: Document SERIAL_SET_TTY_STATE as being immediate.
* ser-unix.c: Use TIOCSETN not TIOCSETP so it is true.
* serial.h, ser-unix.c, ser-go32.c, ser-tcp.c:
Add SERIAL_PRINT_TTY_STATE, SERIAL_NOFLUSH_SET_TTY_STATE, and
SERIAL_SET_PROCESS_GROUP.
* inflow.c: Use them.
* config/xm-svr4.h, config/rs6000/xm-rs6000.h, config/sparc/sun4os4.h:
Define HAVE_TERMIOS.
* Various: Remove all use of TIOC*_BROKEN.
* inferior.h (proc_wait, inferior_proc_init, proc_set_exec_trap):
No longer global functions.
(fork_inferior): New global function from fork-child.c.
* inftarg.c (child_wait): Remove USE_PROC_FS conditional.
(ptrace_me, ptrace_him): New stub functions for fork_inferior().
(child_create_inferior): Moved to fork-child.c as fork_inferior.
(child_create_inferior): New tiny function that calls fork_inferior.
* fork-child.c: New file, containing fork_inferior, which is
built from slight mods to inftarg.c's child_create_inferior.
* procfs.c (procfs_ops): Add target vector.
(attach): Rename as static do_attach.
(procfs_create_inferior): New tiny function that calls fork_inferior.
(child_xfer_memory): Rename to static procfs_xfer_memory.
(store_inferior_registers): Rename to static procfs_store_registers.
(inferior_proc_init): Rename to static procfs_init_inferior.
(procfs_attach, procfs_detach, procfs_prepare_to_store,
procfs_files_info, procfs_open, procfs_mourn_inferior,
procfs_can_run): Slightly mangled copies of the corresponding
child_XXX routines from inftarg.c.
(proc_wait): Renamed to static procfs_wait.
(child_resume): Rename to static procfs_resume.
(fetch_inferior_registers): Rename to static procfs_fetch_registers.
(initialize_proc_fs): Rename to initialize_procfs. Set up
procfs_ops, too.
* xm-irix4.h, xm-sysv4.h (CREATE_INFERIOR_HOOK): No longer needed.
